An experiment investigated whether background lighting affects reading speed. Participants were asked to read a 500-word passage under bright natural-spectrum lighting (Condition A) and record their time. They were then asked to read another 500-word passage of equivalent difficulty under dim fluorescent lighting (Condition B) and record their time. Select from the option letters below (A, B, C, D or E) to identify the independent variable and the dependent variable in this study.
| Type of variable | Letter |
|---|---|
| Independent variable | [ ] |
| Dependent variable | [ ] |
Options:
A: The word length of the reading passages. B: Type of background lighting (bright natural-spectrum or dim fluorescent). C: The age of the participants. D: The time taken to complete reading the passage. E: The difficulty level of the test passages.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
